JPH03150034A - Motor - Google Patents

Abstract

PURPOSE:To obtain a motor which can be machined easily and assembled mechanically by separating a yoke section and a stator, inserting a rotor into the stator and then applying inner and outer coils sequentially. CONSTITUTION:A motor comprises a stator 7 comprising a field pole section 9 and slots 8, a rotor 13, a yoke 5, a field coil 17, a housing 22, and the like. The stator 7 is applied with insulating resin 10 and a triangular pole 11 is formed of the insulating resin. The triangular pole 11 is located at the tip of the pole section 9 and serves as a winding guide. The rotor 13 is then inserted into the stator 7 followed by application of inner and outer coils 17a, 17b. The stator 7 is then pressure inserted into the yoke 5. By such arrangement, circumferential length of the inner coil l7a having high occupation rate in the slot is shortened thus reducing the profile of the coil 17 in the stator 7. Since post processing of the coil such as binding or shaping can be obviated, mechanized assembling is realized.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to an electric motor in which a yoke portion and a stator are separated, a rotating shaft is inserted into the stator, and a coil is wound around the stator. .

[Conventional technology]

Conventionally, in this type of electric motor, as shown in FIG.
It is known that a coil (A) is wound between the slots (1) by an inserter method (see, for example, Japanese Utility Model Application No. 141576 of 1976).

[Problem to be solved by the invention]

In the conventional electric motor as described above, the coil (2) is wound in the slot (1) ffml by the inserter method, so the circumference of the coil (a) becomes longer, so the amount of coils used increases, and the characteristics becomes disadvantageous. In addition, the coil field protrudes from the slot (1) and the end of the coil (2) comes loose, which requires processing time such as forming, coil binding, face treatment, etc., and mechanization is difficult.

This invention was made to solve the problem,
To provide an electric motor that reduces the amount of coils used that exceeds the circumference of the coil, has good characteristics, does not cause the coil to protrude from a slot, does not cause the coil ends to come apart, and can be easily mechanized in post-processing.

[Means to solve the problem]

The electric motor according to the present invention includes a stator having a plurality of magnetic pole parts protruding toward the center from the inner periphery of a yoke part forming an outer ring part, and a rotor inserted into the stator. Comprising an internal coil provided by winding between magnetic pole parts and an external coil superimposed on this internal coil,
A coil with a low space factor in the slot is disposed as the external coil, and a coil with a high space factor in the slot is disposed as the internal coil.

[Effect]

In the present invention, a stator is provided with a plurality of magnetic pole parts formed with slots and protruding toward the center from the inner periphery of a yoke part forming an outer ring part, and a rotor is inserted into the stator.
, comprising an internal coil provided by winding between the magnetic pole parts and an external coil superimposed on the internal coil, wherein a coil with a low space factor in the slot is used as the external coil, and a coil with a high space factor in the slot. By arranging this in the internal coil, the circumferential length of the coil with a high space factor in the slot becomes long, and the outer shape of the coil in the stator becomes small.

〔Example〕

FIGS. 1 to 6 are diagrams showing an embodiment of the present invention,
In the figure, (f) is the yoke part, where the electric steel strip wound into a hoop shape is divided and punched into the stator and rotor core, which will be described later, using a high-speed automatic press (not shown), and at the same time is swaged. They are laminated to a predetermined thickness and form the outer ring part of the electric motor. (6a) is a notch provided on the inner wall of this yoke part, and (7) is a fixing part provided concentrically with the yoke part 4. The magnetic pole part (2) has a plurality of magnetic pole parts (2) that protrude from the inner periphery of the yoke part toward the center by forming slots, and is formed by laminating them to a predetermined thickness. The slot area (8a) of the slot (2) is larger for the internal coil, which will be described later, and smaller for the external coil. The sea bream is an insulating resin provided on this stator by injection molding, for example, and is molded and fixed to the inside of the slot and the end face of the stator (7). (11) is a winding frame molded at the same time with this insulating resin. A pillar located at the tip of the magnetic pole part,
It is a triangular prism with the apex on the stator closed side and serves as a winding guide. Although not shown in the drawings, one end face of the stator ω is provided with an insulating part made of the above-mentioned insulating resin and integrally formed into a funnel shape and having a rotating shaft through hole in the center.
(12) is a bottle main body, which is composed of a bottle (12a) inserted at the tip of the winding frame column and a common part (12b), and is electrically connected to a main coil and an auxiliary coil, which will be described later. The rotor is installed in the stator ■, and the rotating shaft (14) is fitted in the center. (15) is an insulating force bar that is attached to the stator ω through the rotating shaft (14). The end ring (16), which is the conductor part of the rotor (13), is insulated from the outside, and (17) is a coil, which has a high space factor in slot B. Main coil (1B) which becomes internal coil (17a)
and an auxiliary coil (19) which has a low space factor in the slot 8 and serves as an external coil (17b), and is made of, for example, self-bonding magnet wire. (18a) is a winding of the main coil (18). At the beginning, (18b) is the main coil (
18) is the end of winding, (19a) is the beginning of winding of auxiliary coil (19), (19b) is the end of winding of auxiliary coil (19), and (20) is an insulating wedge, which is connected to the above coil (17). It provides insulation from the yoke part (to) and is fitted into the gap between the yoke part 4 and the coil (17). (21) is a bearing mounted on the rotating shaft (14), for example a ball bearing. Consists of bearings.

(22) is an outer casing consisting of a frame (23) and a bracket (24); (25) is a through hole for a bottle provided in this bracket, through which the bottle body (12) is projected.

(26) is a leg (27) that is inserted into this bottle through hole.
The terminal block is made of, for example, an insulating resin, and the legs (27) are provided with openings so that the bottle body (12) can protrude to a predetermined length. The cord groove (29) provided at the end is connected to the terminal block (2).
6) Electronic components placed on top, such as capacitors (2)
9a), a temperature fuse (29b), etc., and a lead wire (30) connected in a predetermined shape is disposed so that its tip is perpendicular to the bottle body (12).

(31) is a power cord whose tip is peeled to a specified size for connection. (32) is a putty, for example, a two-component type that can be cured at room temperature, and also UV-curable to prevent sagging. (33) is a force bar made of metal, for example, and is attached to the bracket (24) to protect the hardened portion of the terminal block (26) and putty (32).

The electric motor configured as described above is assembled so that the rotary shaft (14) is inserted into the rotary shaft through hole in the stator (7) provided with the insulating resin a and the bottle body (12), and rotates. child (13) is stored, and the insulation bar (1
5) is inserted into the rotating shaft (14), and the end ring (1
6) is insulated. Next, a predetermined bottle body (12
) by winding the coil (17) around the rotor (13), and winding it in a protruding manner between the slots 8 so as to go around the rotor (13).
The main coil (18) is formed as an internal coil (17a). Similarly, the coil (17) is wound in a protruding manner between the slots 8 so as to be located above the main coil (18), and then the auxiliary coil (17) is twisted.
9) is formed as an external coil (17b). In this case, as shown in Fig. 4, the end portion (19b) of the auxiliary coil (19) is connected to the end portion (18b) of the main coil (18) in an overlapping manner, and the common portion (12b) )
is formed. Winding start portion (18a) of main coil (18)
By dip-soldering the bottle body (12) to which the winding start portion (19a) of the auxiliary coil (19) is connected, the terminal portion having the coils (18) and (19) and the bottle (12a) is electrically connected. be done. In addition, since the common part is only connected and is not electrically conductive, the connection between the main coil (18) and the auxiliary coil (19) can be confirmed by applying a predetermined voltage between the bins (12a) and checking the withstand pressure. A phase-to-phase withstand voltage test is performed. After that, the common part (12b) is dip soldered, and the stator ω is connected to the notch part (6a) of the yoke part (to).
As shown in FIG. 3, a wedge (20) is fitted to insulate between the coil (17) and the yoke part. Next, the coil (17) is heated to melt the adhesive layer of the self-adhesive magnet wire, fixing the space between the coils (17), and attaching the bearing (21) to the rotating shaft (14).
After attaching an E-type retaining ring (not shown), the yoke portion 4 is press-fitted into the frame (23), and the bracket (24) is connected, for example, by caulking or screws. on the other hand,
Lead wires (30) such as a capacitor (29a) and a temperature fuse (29b) are molded into a predetermined shape and attached to the terminal block (26). And the legs (27) are attached to the bracket (24).
It is attached by inserting it into the bottle through hole (25). In this case, the stator (
The winding frame column (11) part of 7) is inserted, positioned and fixed, and spot welding is performed by applying an electrode to the part where the lead wire (30) tip and the bottle body (12) overlap at right angles. Joined. Next, a test contact (not shown) is brought into contact with the bottle body (12), voltage is applied, and a motor performance test of predetermined items is carried out. And the terminal block (
26) A power supply lead (31) is disposed on top, and its tip is temporarily fixed so as to be perpendicular to the bottle body (12), and joined by spot welding. Furthermore, the terminal block (26)
The top is filled with putty (32) to insulate the charging exposed parts such as the lead wire (30) and fix the power supply lead (31). Finally, the force bar (33) is attached to the bracket (24).

〔Effect of the invention〕

As explained above, the present invention includes a stator having a plurality of magnetic pole parts protruding toward the center from the inner periphery of a yoke part forming an outer ring part, and a rotor inserted into the stator. , comprising an internal coil provided by winding between the magnetic pole parts and an external coil superimposed on the internal coil, wherein a coil with a low space factor in the slot is used as the external coil, and a coil with a high space factor in the slot. By placing this in the internal coil, the slot space is effectively used and the coil is wound directly orthogonally to the stator, resulting in a short coil circumference, reducing the amount of coil used, and reducing the need for a winding former. Since this is not necessary, the winding speed is increased, the height of the coil end is reduced, and the coil no longer protrudes, so post-processing such as thread tying and shaping can be eliminated.

[Brief explanation of the drawing]

1 and 2 are assembled perspective views showing one embodiment of the present invention, FIG. 3 is a perspective view showing the installation of the wedge, and FIG.
The figure also shows a coil connection diagram of the motor, Fig. 5 is a winding plan view of the main coil, Fig. 6 is an assembled plan view of the stator, and Fig. 7 is a plan view of the stator showing a conventional electric motor. . In addition, (to) is a yoke part, (7) is a stator, 8 is a slot, (9) is a magnetic pole part, (13) is a rotor, (17) is a coil, (17a) is an internal coil, (17b) is an external coil.

Claims (1)

[Claims] a stator having a plurality of magnetic pole parts that form slots and protrude toward the center from the inner periphery of a yoke part forming an outer ring part;
A rotor is inserted into the stator, and includes an internal coil provided by winding between the magnetic pole parts and an external coil superimposed on the internal coil, and the coil with a low space factor in the slot is connected to the external coil. An electric motor characterized in that a coil with a high slot space factor is arranged in the internal coil.